Machine for crushing stone



G. A. ROLLiNS.

Stone Crusher.

No 29,197. Patented July 17, 1860.

UNITED STATES PATENT OFFICE.

GEORGE A. ROLLINS, OF NASHUA, NEV HAMPSHIRE.

MACHINE FOR CRUSHING STONE.

Specification of Letters Patent No. 29,197, dated July 17, 1860.

To all whom it may concern:

Be it known that I, GEORGE A. RoLLINs, of Nashua, in the county of Hillsboro and State of New Hampshire, have invented certain new and useful Improvements in Machines for Crushing Stone or Any Hard Substances for Macadamizing Roads and other Purposes; and I do hereby declare that the fol lowing is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification, and in which Figure 1 represents a plan or top view of the machine. Fig. 2 represents a side view looking in the direction of arrow 1, Fig. 1. Fig. 3, represents a section on line A B, Fig. 1, looking in the direction of arrow 1. Fig. 4, represents the vibrating crushing block D, detached, and Fig. 5, represents a section on line a b, Fig. A.

A A, represent the main frame of the machine which is supported on axles B, B, upon the ends of which are wheels 0, C, and C, C.

The main frame A, is fastened to axle B, by clasps or shackles a, and to axle B, by a king bolt 6. The frame A, is made in the form shown in the drawings-having a central box open at the top and bottom, the sides being perpendicular, but the front and rear ends are made flaring as they extend up from the bottom of the machine. In the center of the box or opening in the main frame A, is arranged the central crushing block D, which in this instance is hinged at (Z, to each side of the frame A. Vithin the space 0, is fitted a sliding piece f, which is free to rise and fall in the space 0, but is prevented from moving laterally in consequence of the parts 0, 0, being grooved out, see Fig. 1. The shaft 6, is provided with an eccentric e, which works in sliding piece f, as fully shown in Fig. 3, while abolt cl, is passed through the ears or parts 0, a, above shaft e, eccentric e, and sliding piece f.

The crushing block D, is provided in front and in rear with dovetailed corrugated jaws D D, which slide up and down in grooves in block D, as shown in Fi s. 3, 4, and 5, being regulated by screw bolts f, 7", so as to work at different elevations.

The inner front and rear ends of the frame or box A, are provided with corrugated jaws E, E, which have projections 1, 1, which slide down in grooves in the frame A, so that the jaws E, E, when driven down are firmly wedged in, being made slightly tapering-the widest part being up.

Under the box of the main frame and crushing block D, runs an endless sifting chain composed of side bands or links h, h, and lateral bars 7'. This chain is supported in front by a roll 9 suspended by suitable bearings from the frame A, and in rear by a roll 2', which turns in the lower ends of the rear bent arms 70, 70.

F, is a balance wheel on one end of shaft 0, while F, is the pulley by which motion is communicated to the crushing mechanism.

The operation is as follows: The machine is guided and drawn by thills H, H, and'the parts connected therewith to the place desired, when the wheels are raised into the friction concaves J, on the base pieces I. A band or belt is then passed in a suitable manner from a portable steam engine over pulley F whereby motion is communicated to shaft 6, and eccentric e, causing the sliding piece f, to rise and fall, and also to sway back and forth and thus give to the crushing block D, a vibrating motion on its center or hinge (Z. This is due to the fact that the sliding piece f, can rise and fall independently of the block D, but cannot move forward and back without moving the block D. Attendants now shovel in the stones or other hard substances which it is desired to crush, into the crushing chambers E, E, when at each vibration of the block D, the stones to be crushed will be forced by the corrugated jaws D, against corrugated jaws E, whereby the stones or otherhard substances are broken up and gradually reduced in size until the broken parts are so small as to drop down between the lower ends of jaws D, and E, upon the sifting chain or apron h, which allows all of the fine dust and dirt to drop through upon the ground, while the broken stone is conveyed to the rear of the machine where it can be shoveled int-o carts 01' drays and conveyed to the place of deposit. Motion is communicated to roll 9, and from thence to the sifting belt, from pulley G, on shaft 6, by means of belt G, and pulley Grthe latter of which is connected to the shaft of roll 9'.

The openings through which the crushed stone or other hard substances fall, from the crushing chambers E, E, can be made larger or smaller by simply turning the adjusting 7 the crushed stone at the bottom to fall down and thus give place for larger pieces to occupy a position in which upon the neXt vibration of the crushing block D, they will in turn be reduced to the desired size.

The corrugated jaws E, E, can be quickly removed and replaced by others; since all that is necessary is to use a hammer and driving stick against their bottoms, when they will be driven up, so that others can be slid down in the grooves in the main frame A. By this simple arrangement jaws having different sized corrugations can be used at pleasure, and that too, without removing a single bolt. The jaws D, D, can also be removed in a very quick manner, by first removing adjusting bolts 7", f.

My machine is very simple in its construction, while the parts are strong and durable and are not liable to get out of order. Then again the arrangement of the central crushing block D, in respect to the frame A, is such that While the crushed and broken stone is falling from one chamber E, the stone in the other chamber is being broken; thus economizing power, and greatly facilitating the work of crushing. The machine is portable, and can be set at any desired place, while by means of the sifting apron the fine dust and dirt are separated from the crushed stone, and the latter delivered at the rear of the machine in a convenient position to be removed.

The base pieces I, instead of having concaves J, might be cut out so as to allow the wheels to drop into such depressions, when the machine is to be put into operation.

The use of crushed stone for macadamizing roads is becoming quite extensive, and my machine has been practically tested and found to operate with entire satisfaction.

WVhat I claim and desire to secure by Letters Patent, is

1. The combination of the crushing chambers E E with a central vibrating crushing block for the purposes stated.

2. The combination of the corrugated jaws D, D, and adjusting screws f, f, with the central block D, constructed and operating substantially as set forth.

3. The combination of shaft 6, eccentric e, and sliding piece f, with the crushing block D, substantially as set forth.

GEO. A. ROLLINS.

Witnesses:

ROGER W. PORTER, IVORY HARMON. 

